Bonds between Metals and Nanocomposites Occurring in Explosion Welding
M. P. Bondar1, E. V. Karpov1,2, Ya. L. Lukyanov1
1Lavrent'ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2Novosibirsk State University, Novosibirsk, 630090 Russia
Keywords: сварка взрывом, нанокомпозит, мезоструктурный материал, деформируемость, скорость деформации, изгиб, прочность сварного соединения, explosion welding, the nanocomposite, mesostructural material, deformability, strain rate, bending, welded strength
Abstract
This paper describes the study of the influence of a microstructure characterized by directed or chaotic distribution of nanoinclusions and strain rate on the deformability of a nanocomposite. It is revealed that, under identical load conditions, crack formation occurs in nanocomposites whose structural elements are mostly directed in the same way at lower strain rates than in nanocomposites with chaotic distribution of the hardener. It is shown that, as the strain rate increases, the influence of the structural order on the limit deformation reduces due to transition from shear strain to rotational strain. No cracks are formed in bonding metals and nanocomposites by explosion welding. The experimental results obtained in the study of transverse bending of two-layer welded beams and the structure in the vicinity of the weld reveal that the obtained metal - nanocomposite compound has a uniform structure retained in deformation, with fracture occurring in the nanocomposite.
DOI: 10.1134/S0021894416050023
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